Piemontite Dollase W A American Mineralogist 54 (1969) 710-717 Crystal structure and cation ordering of piemontite _database_code_amcsd 0000191 8.878 5.692 10.201 90 115.40 90 P2_1/m atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Ca1 .7574 .75 .1533 .77 .0044 .0065 .0025 0 .0025 0 Ca2 .5979 .75 .4250 .87 .81 .0029 .0104 .0014 0 .0005 0 Sr2 .5979 .75 .4250 .13 .81 .0029 .0104 .0014 0 .0005 0 Si1 .3410 .75 .0448 .52 Si2 .6846 .25 .2745 .51 Si3 .1855 .75 .3197 .35 Al1 0 0 0 .80 .47 Mn1 0 0 0 .14 .47 Fe1 0 0 0 .06 .47 Al2 0 0 .5 .56 Mn3 .2957 .25 .2216 .58 .39 .0009 .0036 .0014 0 .0004 0 Fe3 .2957 .25 .2216 .25 .39 .0009 .0036 .0014 0 .0004 0 Al3 .2957 .25 .2216 .17 .39 .0009 .0036 .0014 0 .0004 0 O1 .2330 .9912 .0356 .81 O2 .3058 .9795 .3550 .80 O3 .7963 .0163 .3378 .81 O4 .0588 .25 .1318 .59 O5 .0424 .75 .1473 .70 O6 .0686 .75 .4091 .62 O7 .5145 .75 .1805 .80 O8 .5276 .25 .3140 .92 O9 .6208 .25 .0986 .99 .0057 .015 .0023 0 .0030 0 O10 .0868 .25 .4330 .60 H1 .04 .25 .36